Knuckle-joint connection



W. JONES.

KNUCKLE JOINT CONNECTION.

APPLICATION FILED AUG-10.1921- 1,427,892, v Patented Aug. 29, 1922 &1

INVENTOR ATTORNEY units amass manna caries.

WALTER JONES, OF NEW BRUNSWICK, NEW JERSEY, ASSIG-NOR, BY MESNE ASSIGN-MENTS, 'lO BRUNSWICK-KROESCHELL COMPANY, OF NEW BRUNSWICK, NEW (FER-SEY, .A CORPORATION OF NEW JERSEY.

KNUCKLE-JOINT CONNECTION.

Application filed August 10, 1921.

T 0 all ivhom it may concern:

Be it known that I, TALTER Joxns, a citizen of the United States,residing at New Brunswick, in the county of Middlesex, in the State ofNew Jersey, have invented certain new and useful Improvements inKnuckle-Joint Connections, set forth in the following specification.

.The invention relates to an improvement in knuckle joint connectionsfor pistons and rods, and more particularly to an improvement in theknuckle joint connection between the piston and eccentric rod or strapdisclosed in U. S. Patent No. 899,583, dated September 29, 1908.

he knuckle joint connection between the piston and the eccentric rod orstrap shown in that patent comprises a cylindrical head formed on oneend of the eccentric strap and received within a transverse bore in thepiston. The construction and'arrangement of this knuckle jointconnection enable the parts to continue in use for long periods withoutrepair or replacement. When the parts have become worn by reason of longuse, however, there is no provision for taking up the lost motion. Theobject of the present invention is to produce an improved knuckle jointconnection between pistons and eccentric rods or straps having provisionwhereby compensation for wear may be made without dismantling themachine. To this end the invention consists in the improved knucklejoint connection hereinafter described and. particularly pointed out inthe appended claims.

The preferred form of theinvention is illustrated in the accompanyingdrawings in which Fig.1 is a verticalsection through the improvedknuckle joint connection; Fig.

2 is a side elevation of the parts shown in Fig. 1; and Fig. 3 is a.detail of a modified form of eccentrlc strap head.

The improved knuckle joint connection for pistons and eccentric rods orstraps, as illustrated in the drawings, comprises in gen-' eral aneccentric strap 5 having at its upper end a. cylindrical head 6 receivedwithin a bore 7 formed transversely in the lower part of the cylinder 8.The head is provided withthe longitudinal grooves 9 for lubrication.These parts may be of any usual or preferred construction, and forpurposes. of illustration and description are Specification of Letterslatent.

taken up.

Patented Aug. 29, 1922.

Serial No. 491,105. I

shown substantially as disclosed in said patent. As the pistonreciprocates in the cylinder of the machine or pump, the head of theeccentric rod transverse bore in the piston. Inasmuch as thereciprocating motion is transmitted to the piston by the eccentricstrap, it is necessary that there'be no lost motion between the head ofthe eccentric strap and the piston.

- The improved means of the present inven tion for taking up orcompensating for lost motion between the eccentric strap and the pistoncomprises a pair of truncated cones 10 and 11 received in tapering holesbored longitudinally in the head 6 of the eccentric strap, as clearlyshown in Fig. 1. The holes in the head of the eccentric strap tapertoward the central portion 12 thereof. Each cone is of such length thatwhen it is inserted in its corresponding tapered bore in the eccentricstrap headit projects therefrom sufliciently to provide for considerableexpansion o fthe eccentric strap head. In

'order that the head may be expanded to take up or-compensate for lostmotion it is provided on its upper side with a longitudinal slot 13. Theeccentric head is subject to greater wear on its top side than on itslateral sides. In order that the head when expanded to compensate forwear, may expand more at the top than at the sides, the lateral sides ofthe tapered holes are cut away or relieved at 18, as shown in themodified 'form' of eccentric head illustrated in F ig. 3. \Vhen thecones are drawn toward each other to expand the head, the expandingpressure is exerted" on the points.19 and thus the extra wear on the topis readily The eccentric sti'ap head is expanded by drawing the cones l0and 11 toward each other. For this purpose a screw 14 is looselyreceived in the cone 11 and is threaded into or straposcillates in thethe cone 10. To take up lost motion in the thr'eads a spring collar 15-is inserted between the head 16 of the screw and the bottom of the borein which the screw head is received.

It will be observed that the construction of the means for taking up orcompensating for lost motion between the piston and the eccentric strapis such that the eccentric strap head may be kept substantially in itstrue cylindrical form, thereby assuring smoothness and efliciency inoperation. The screw l l-may be reached to draw the cones toward eachother to expand the eccentric:

strap head to take up lost motion by passing a square-ended wrenchthrough a hole cut in the side of the cylinder for that purpose. Thehead 16 of the screw is provided with a broached hole 17 to receive thesquared end of the wrench.

It will be understood that the present invention provides a simple andefficient means fortaking up of compensating for lost motion betweenpistons and eccentric rods or straps. The adjustment means is soconstructed that the necessary adjustment may be made withoutdismantling any of the parts of the machine or pump. Thus a great savingof time and labor is secured; and moreover, the machine or pump may bekept in nice adjusment at all times because of the facility with whichthe adjustment maybe made.

Having thus described the invention, what I claim as new is 1. A knucklejoint connection thereof; H for pistons and rods comprising acylindrical head having a longitudinal slot received within a transversebore in the piston, said head having tapered holestapering'toward themiddle of the head, a conein each tapered hole, and a screw connectingthe coneswhereby they maybe drawn toward each other to expand the headto take up lost motion between it and the transverse bore in the piston.

2. A knuckle joint connection for pistons and rods comprising acylindrical head having a longitudinal slot received Within a ttransverse bore in the piston, said head having tapered holes taperingtoward the middle of the head, a cone in each tapered hole, a screwconnecting the cones whereby they may be drawn toward each other toexpand the head to take up lost motion between it and the transversebore in the piston, said tapered holes being relieved at their lateralsides so that greater expanding pressure may be communicated to the topside of they cylindrical head than to the lateral sides WALTER JONES."

